This robotic fish can explore the ocean by itself

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Researchers at the University of Kitakyushuu [JP] in Southern Japan (where else) developed a battery-powered robotic snapper that can swim in salt water for about one hour to gather oceanographic data.

The fish weighs 7kg and is covered by a silicone body. It is able to move like a real snapper via a tailor-made propulsion system, making it possible for the the robot to blend into its natural surroundings.

The engineers involved in the project say they are ready to mass-produce the robot, which is currently a unique piece. The fish was shown to the general public during an event on the university campus last week. A robotic manta ray is in development as well.